<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <h1 v-if="isShow">表达式的值为真，就能显示</h1>
</div>
    <script type="text/javascript">
        var vm=new Vue({
            el:'#app',
            data:{
                isShow:true
            }
        });
    </script>
</body>
</html>